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111.
高锰酸钾对水中天然有机物氯化活性的影响 总被引:3,自引:1,他引:2
利用树脂分离技术将水中天然有机物分为腐殖酸(HA)、富里酸(FA)、亲水酸(HPIA)和其它亲水物质(HPI-NA)等4部分,研究了高锰酸钾对不同有机组分卤代活性的影响.结果表明,高锰酸钾增加了腐殖酸和其它亲水物质加氯的卤代活性,降低了富里酸和亲水酸的卤代活性,如投加0.75 mg/L高锰酸钾时,腐殖酸和其它亲水物质的卤代活性增加了39.3%和13.8%,而富里酸和亲水酸卤代活性降低了33.6%和46.9%;通过对SUVA的考察可知,高锰酸钾增加了腐殖酸和其它亲水物质的碳碳不饱和双键的含量,使其卤代活性增 相似文献
112.
113.
Organic matter is known to be the precursor of numerous chlorination by-products. Organic matter in the secondary e uent from
the Wenchang Wastewater Treatment Plant (Harbin, China) was physically separated into the following fractions: particulate organic
carbon (1.2–0.45 m), colloidal organic carbon (0.45–0.1 m), fine colloidal organic carbon (0.1–0.025 m), and dissolved organic
carbon (DOC) (< 0.025 m). Moreover, < 0.45 m fraction was chemically separated into hydrophobic acid (HPO-A), hydrophobic
neutral (HPO-N), transphilic acid (TPI-A), transphilic neutral (TPI-N), and hydrophilic fraction (HPI). The chlorine reactivity of these
organic fractions obtained from both size and XAD fractionations were evaluated. The structural and chemical compositions of the
HPO-A, HPO-N, TPI-A, and TPI-N isolates were characterized using elemental analysis (C, H, O, and N), Fourier transform infrared
spectroscopy (FT-IR), and proton nuclear magnetic resonance spectroscopy (1H-NMR). Results showed that DOC was dominant in
terms of total concentration and trihalomethane formation potential (THMFP), and there was no statistical di erence in both specific
THMFP (STHMFP) and specific ultraviolet light absorbance among the 0.45, 0.1, and 0.025 m filtrates. HPO-A had the highest
STHMFP compared to other chemical fractions. HPO-A, HPO-N, TPI-A, and TPI-N contained 3.02%–3.52% of nitrogen. The molar
ratio of H/C increased in the order of HPO-A < HPO-N < TPI-A < TPI-N. The O/C ratio was relatively high for TPI-N as compared
to those for the other fractions. 1H-NMR analysis of the four fractions indicated that the relative content of aromatic protons in HPO-A
was significantly higher than those in the others. The ratio of aliphatic to aromatic protons increased in the order of HPO-A < HPO-N <
TPI-A < TPI-N. FT-IR analysis of the four fractions showed that HPO-A had greater aromatic C==C content whereas HPO-N, TPI-A,
and TPI-N had greater aliphatic C–H content. TPI-N contained more oxygen-containing functional groups than the other fractions. 相似文献